Malicious PDF — malware analysis report

Static analysis result for SHA-256 febb8e41cd2ec084…

MALICIOUS

PDF

75.4 KB Created: 2021-02-26 19:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 142eed5ec8c02f416f69561202c8ca55 SHA-1: a01db137562914f514918a6fa05a902ca9775f6a SHA-256: febb8e41cd2ec084add3df5213e69346e9022607c4e3a9edc677dfd1417980ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with a primary focus on directing users to download content related to games. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to exploit user interest in game downloads to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/wix?keyword=download+apk+garry%2527s+mod+prop+hunt PDF link annotation
    • https://cdn.sqhk.co/rijomawonuj/cQIijjd/idle_heroes_forge.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/LtCicdA/53686177932.pdfIn PDF document text
    • http://malespw.xyz/bekelakafonejx6two.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/gA50ohb/39981013431.pdfIn PDF document text
    • https://cdn.sqhk.co/juwovatagevi/X3Wjjgd/tujigugafexa.pdfIn PDF document text
    • http://eduha.online/kiwosezolumguxr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_6033edd133301.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/bTgjzzY/second_hand_designer_clothes_online_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/schiQLc/jidubiwet.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/ohcjhje/special_agent_oso_season_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372378/normal_600808e5ba9ef.pdfIn PDF document text
    • http://tertov.xyz/51811692720qhj3l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebodevafetag.epizy.com/expert_systems_and_applied_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/aida64_full_mega.pdfIn PDF document text
    • http://gozozofufeb.rf.gd/logixoxalatifuza.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/best_stroller_car_seat_combo_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/tileninozivo.pdfIn PDF document text
    • http://matewodupenes.epizy.com/39590251287.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 5664 bytes
SHA-256: 669608106f247368333b0bb636bcfaca965fed91dcb1b2ad2675a827662e6066
font_01_sfnt_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 10676 bytes
SHA-256: 31a7bebee79f4caa8a2f5fff0e7b43b7e111f6aff4d0f98ad6b5955949685518

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